Aliasing-based incoherent optical spatial image processor
Anno: 2009
Autori: Paturzo M., Ferraro P., Zlotnik A., Zalevsky Z.
Affiliazione autori: CNR, Istituto Nazionale di Ottica Applicata, Sez. Napoli, Via Campi Flegrei 34-80078, Pozzuoli, Italy; School of Engineering, Bar-Ilan University, Ramat-Gan 52900, Israel
Abstract: We present a configuration for a real-time spatial image processor that is based upon an imaging setup in which a grating with Fourier coefficients with tunable phase is attached to the object plane. The illumination that is used for the proposed concept is spatially incoherent. By proper adjusting of the magnification of the imaging system to the spatial period of the grating and the sampling grid of the camera, the aliasing effect due to the digital sampling realizes a nonuniform and tunable spectral distribution (a filter) that is applied over the spectrum of the object. Preliminary numerical and experimental demonstration of the operation principle is provided with a spatial LiNbO3 hexagonal grating. (C) 2009 Optical Society of America
Giornale/Rivista: APPLIED OPTICS
Volume: 48 (29) Da Pagina: 5537 A: 5545
Parole chiavi: image processingDOI: 10.1364/AO.48.005537Citazioni: 1dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-05Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui